Properties of the chalcogenide-carbon nano tubes and graphene composite materials

Singh, Abhay Kumar and Kim, JunHo and Park, Jong Tae and Sangunni, KS (2015) Properties of the chalcogenide-carbon nano tubes and graphene composite materials. In: JOURNAL OF ALLOYS AND COMPOUNDS, 627 . pp. 468-475.

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Abstract

Composite can deliver more than the individual elemental property of the material. Specifically chalcogenide- multi walled carbon nano tubes and chalcogenide- bilayer graphene composite materials could be interesting for the investigation, which have been less covered by the investigators. We describe micro structural properties of Se55Te25Ge20, Se55Te25Ge20 + 0.025% multi walled carbon nano tubes and Se55Te25Ge20 + 0.025% bilayer graphene materials. This gives realization of the alloying constituents inclusion/or diffusion inside the multi walled carbon nano tubes and bilayer graphene under the homogeneous parent alloy configuration. Raman spectroscopy, X-ray photoelectron spectroscopy, UV/Visible spectroscopy and Fourier transmission infrared spectroscopy have also been carried out under the discussion. A considerable core energy levels peak shifts have been noticed for the composite materials by the X-ray photoelectron spectroscopy. The optical energy band gaps are measured to be varied in between 1.2 and 1.3 eV. In comparison to parent (Se55Te25Ge20) alloy a higher infrared transmission has been observed for the composite materials. Subsequently, variation in physical properties has been explained on the basis of bond formation in solids. (C) 2014 Elsevier B. V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF ALLOYS AND COMPOUNDS
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Keywords:	Chalcogenide; Composites; Multi walled carbon nano tubes; Bilayer graphene
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	19 Mar 2015 11:34
Last Modified:	19 Mar 2015 11:34
URI:	http://eprints.iisc.ac.in/id/eprint/51017

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